In this paper, we investigate limit cycle bifurcations by perturbing planar piecewise Hamiltonian systems with a switching line $ \left\{(x,y): y = \pm kx, k\right. $ $ \left.\in(0,+\infty), x\geqslant0\right\} $ via multiple parameters. With the help of Han and Xiong [
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A periodic orbit of the system (1.1) with
A periodic orbit of the system (1.7) with
The periodic orbits of the system (1.7) with