A new type of variable cell kinematic pair is designed， which can be used to realize the reconstruction of 3-revolute-joint，revolute-joint，revolute-joint（RRR） planar parallel mechanism. The kinematic models of R-R-R and revolute-joint，prismatic-joint，revolute-joint （R-P-R） modes are derived and verified， including forward and inverse solutions， which can be used to calculate the singular configuration and workspace of parallel mechanism.The research results show that the designed variable cell kinematic pair can realize the reconfiguration function of the mechanism. The forward kinematics algorithms in the two modes are consistent， both of which are unary eighth-order equations. The inverse kinematics solution of R-R-R type is three quadratic equations， and the inverse kinematics solution of R-P-R type can be expressed directly by the distance formula between two points. Finally， the correctness of the kinematic model is verified by the virtual prototype experiment.