Abstract:China is making ecological security the core issue of urban disease control. In the work of ecological restoration, it is faced with the double test of diversification of disaster causing factors and vulnerability of disaster bearing body. As an important ecological gateway facing the Bo-Hai Sea in the Beijing-Tianjin-Hebei region, Tianjin is facing a severe ecological security risk situation. However, the existing research results are still in the initial stage of putting forward risk management measures based on the concept of ecological resilience. Most of the resilience evaluation is aimed at the design of refuge and evacuation places and disaster prevention engineering, so it is impossible to establish a direct connection between the resilience system and ecological security pattern, and the related results are also difficult to be applied in the level of urban planning and management. Based on ecological security pattern and toughness coupling between urban development and demands, to Tianjin City as the object of empirical study, using 2005-2017, Tianjin TM/ ETM + images and ASTER GDEM data, in accordance with the basic theories of landscape ecology and analysis tools was proposed based on “Source-Flow-Sink” 3D evaluation methods of urban ecological resilience by toughness source identification, the ecological footprint accounting and minimum cumulative resistance simulation analysis of three kinds of toughness index respectively. Among them, resilience “Source” refers to the patches in the urban ecological security pattern that can provide ecological resilience services, such as vegetation buffer, habitat maintenance and water and soil conservation. The “Resilience Sink” refers to the resistance surface affecting the ecological resilience recovery, such as the scale of the built-up area, population density, etc. The resilient “Flow” refers to the safe space carrier connecting the “Source” and “Sink”, such as ecological corridor and urban form. In this way, the suggestions on improving the ecological resilience of the central urban area of Tianjin are put forward to ensure that the city has the resilience and resilience to respond to pressure or risk conditions in the face of uncertain disturbances. The “Source-Flow-Sink” index analysis method is a quantitative analysis and evaluation method of resilience strength based on the research on the coordination and symbiosis among the three basic ecological resilience factors, namely urban built environment, ecological resource background and residents’ ecological footprint demand. Three kinds of resilience indexes not only restrict ea散?椠湯瑴敨湥獲椠瑢祵?漠晡?敳捯漠汤潥杣楩捤慥氠?牨敥猠楳汴楡敢湩捬敩??琠桯敦?牵敲獢楡汮椠敥湣捯敬?潧晩?捡潬渠獳瑥慣湵瑲?牴敹猠楰獡瑴慴湥捲敮?猠畔牨晲慯捵敧?椠獴?瑵潧潨?扥楳杳?琜潓?獵敲湣摥?灆牬潯灷攭牓??敫爝漠獴楨潲湥?攠捤潩汭潥杮楳捩慯汮?獬漠畩牮捤敥?愠湥摶?捬慵畡獴敩?潮映?瑯桵敮?攠捴潨污潴朠楔捩慡汮?敩湮瘠楃物潴湹洠散湥瑮?灥牲漠扳汰敡浣獥??慩湳摴?瑩潢畵杴桩?牮攬洠楥瑡?扨攠愊牧楲湯杵?猠畴牯晵慧捨敮?楳獳?瑳潴潲?獮浧慴汨氠?睮楤汥汸?捯慦甠獴敨?琠桴敨??敥挠潤汩潦杦楥捲慥汮?映潩潮瑦灬牵楥湮瑣?愠湯摮?瑵牲楢条杮攠牥?獯潬捯楧慩汣?獬攠捲略牳楩瑬祩?摮散浥愠湬摥?楥獬?琠潷潨?桮椠杴桨??獦潡?扥漠瑯桦?摰敲捯楤摵散摴?瑯潮?畳牡扦慥湴?猠灡慣瑣楩慤汥?整硳瀬愠渊獥楮潶湩?潯普?瑥桮整?獬挠慰汯敬?慵湴摩?摮椠牡敮捤琠楮潡湴?潲晡??獤慩晳敡瑳祴??????畣捨琠楡汳攠?晩汳潫眠?楴湩摬敬砠?楨獯?瑥桤攠?獥瑡慫湥摲愠牥摬?晳潴物?攠汲慥獳瑩楬捩?牮散来甬氠慣瑥楮潴湲?潬映?畩牴批愠湥?浯潬牯灧桩潣污潬朠祲??啩牬扩慥湮?浥漠牳灨桯潵汬潤朠祢?眠椊瑤桹?条潭潩摣?瑡潮畤朠档湯敮獴獩?獵桯潵畳氠摰?扯散??瑳栬攠?獭灰慨瑡楳慩汳?捯潮甠灴汯極湧杨?扥敳瑳眠攜敓湯?摲畣捥琭楆汬敯?猭潓畩牮捫攝?慥湬摥?摥畮捴瑳椠汩敮?獴楩湭步??呮桤攠?慰摡橣略猠瑳浴敲湵瑣?潵晲?甠牡扤慪湵?浴潭牥灮桴漮氊漀最楔捨慥氠?敥汳慵獬瑴楳挠楳瑨祯?猠桴潨畡汴携?渱漩琠?潨湥氠礜?捯潵湲瑣牥漭汆?瑯桷攭??摮楫猝漠牲摥敳物汬祩?敮硣灥愠湩獮楤潥湸?潳映?摥畳捴瑲楩汣整?獥楡湣歨猠??扨略瑲?慡汮獤漠?楦湦捥牣整愠獴敨?琠桲敥?湴畯浲扡整物?潮映?扦氠畵敲?条牮攠敥湣?汬慯湧摩獣捡慬瀠攊獲???牬敩敥湮督慥礮猠?愠湳摩?睧慬瑥攠物?獤祥獸琠散浡獮?獯桮潬畹氠摤?扳散?畩獢敥搠??瑥漠?整湲牥楮捧桴?琠桯敦?捵潲浢灡潮猠楥瑣楯潬湯?潩晣?畬爠扲慥湳?摬畩捥瑮楣汥攠?獡潣畴牯捲敳猬?慳湯搠?楮浬灹爠潴癨敥?瑣桯敭?敩汮慡獴瑩楯据?慯摦愠灴瑨慲瑥楥漠湩?瑤潥?瑥桳攠?散硡灮愠湤獥楴潥湲?潩普?搠畴捨瑥椠汳整?獢楩湬歩獴? of urban ecological security pattern. 2) That the source of toughness index is the condition of ecological safety threshold is defined, and the toughness of the Tianjin City center source safety threshold should be kept in the range of 1.5 2, the lower the toughness index of source suggests that city construction the more serious the damage to the natural ecological environment, once broke the minimum safety threshold, the steady state will be difficult to restore the ecological environment system. Therefore, the change of resilience source index should be carefully treated as the primary condition to ensure urban ecological security. 3) The resilience sink index is the bottleneck of the safe expansion of urban space and can represent the ecological footprint or ecological consumption intensity of residents under different urban densities. Tianjin City center toughness index should be maintained in the average level of 0.22 to ensure the sustainability of the urban construction, once the Td>0.35 breakthrough will lead to incremental construction ecological environment capacity and greatly reduce th