The invention relates to a liquid floated pendulum type accelerometer temperature control model parameter identification method. According to the liquid floated pendulum type accelerometer temperature control model parameter identification method, a liquid floated pendulum type accelerometer temperature control model is revised into a first-order delay inertia model from a first-order inertial model, and an optimal sample space-based parameter identification method is put forward, and a relative residual error (SL) is constructed so as to be adopted as a regression model for liquid floated pendulum type accelerometer temperature control model parameter identification; an optimal sample space is obtained through conditional judgment and iterative calculation, so that high-accuracy identification of a time constant tau of a pure delay link and a time constant T of a first-order inertia link can be realized, and a basis can be provided for liquid floated pendulum type accelerometer temperature control system PID control parameter design, and the temperature control accuracy of a liquid floated pendulum type accelerometer can be increased, namely, the temperature control accuracy can be increased from a range (-1 DEC C, 1 DEC C) which is realized when the first-order inertial model is adopted to a range (-0.006 DEC C,+0.006 DEC C) which is realized when the first-order delay inertia model is adopted, and high-accuracy use requirements of the liquid floated pendulum type accelerometer can be satisfied.