In order to strengthen anti-interference and anti-interception performance of chaotic system in communication link， and improve complexity of chaotic system behavior， based on typical Chua’s circuit and step function， a new type of grid multi-scroll chaotic system family with controllable quantity was constructed. First， two sets of step functions were used as nonlinear controllers of the system， which respectively controlled the numbers of the odd and even columns and the arranging rows for the grid multi-scroll chaotic attractors， and kept the scrolls and bonds in chaotic attractors being interleaved with each other. As a result， the arbitrary number of odd and even columns for the grid multi-scroll were realized. Then， the dynamic properties of system such as equilibrium point， Lyapunov exponent and attractor were theoretically analyzed and numerically simulated. Finally， the hardware experiment results of up to 4 rows and 12 columns of grid multi-scroll were given by Field Programmable Gate Array （FPGA）. Hardware and software experimental results are in full agreement with theoretical analysis results， which furtherly proves the proposed system’s physical realizability.