To　understand　the　complex　dynamics　of　Kingni-Jafari　system　with　hidden　attractors,　the　first　objective　of　this　paper　is　to　study　the　global　dynamics,　and　give　a　complete　description　of　the　dynamics　of　Kingni-Jafari　system　at　infinity　by　using　the　Poincare　compactification　of　a　polynomial　vector　field　in　R-3.　The　second　objective　of　this　paper　is　to　prove　the　existence　of　periodic　solutions　in　the　Kingni-Jafari　system　by　classical　Hopf　bifurcation　and　degenerate　Hopf　bifurcation.　Moreover,　based　on　averaging　theory,　a　small　amplitude　periodic　solution　that　bifurcates　from　a　zero-Hopf　equilibrium　was　derived　in　the　Kingni-Jafari　system.　The　theoretical　analysis　and　simulations　demonstrate　the　rich　dynamics　of　the　system.