Heshiiskii Saaxiibtinimada iyo Isbahaysiga (Chinese: 中蘇友好同盟條約) wuxuu ahaa heshiis ay kala saxiixdeen Dowladdii Qaranimada ee Jamhuuriyadda Shiinaha iyo Midowgii Soofiyeeti 14kii Ogosto 1945. Ciidamada Soviet-ka iyo kuwa Mongoliya ayaa qabsaday gudaha Mongolia iyo Manchuria, kadib markii ay ka qabsadeen Japan
Dagaalkii Labaad ee Adduunka Bayaan la xiriira heshiiska, Shiinaha wuxuu aqbalay madaxbanaanida Mongolia Dibedda ee xuduudaheedii hore wuxuuna diiday ujeedooyinkii Pan-Mongolist ee gumaystayaasha haddii aftida arrintan la qabto iyo Midowga Soofiyeeti oo joojiyay caawinta Xisbiga Shuuciga ah ee Shiinaha iyo Ciidanka Qaranka ee Ili (oo ku kacaayay Xinjiang). Labada dal waxay sidoo kale ku heshiiyeen inay si wada jir ah u xakameeyaan Wadada Tareenka ee Bariga Shiinaha iyo inay fududeeyaan ku soo noqoshada ugu dambeysa ee madaxbanaanida Shiinaha.