The existing Volt/Var control models are mainly solved based on second order conic relaxation, which cannot take the voltage deviation as the objective function and take up a lot of CPU time. In this paper, the Volt/Var control strategy based on linearized power flow model is proposed. Firstly, based on the branch power flow, the Volt/Var control model is built considering various regulating devices such as on load tap changer (OLTC), capacitor bank (CB) and photovoltaic (PV). And the integer variables in the model are relaxed to continuous variables in order to construct a second order conic programming (SOCP). Then the power flow equations are expanded based on the benchmark state calculated by SOCP in order to linearize the model. The linearized power flow (LPF) is solved to minimize voltage deviation and restore the continuous variables to integer variables. Finally, the simulation on improved IEEE 33-bus distribution network system showed that the proposed LPF model is accurate and efficient, which is suitable for real time Volt/Var control in distribution network.